My apple watch turns all red.
Hello, I’m currently using Apple Watch Series 3 for 3 years+ and suddenly after charging for 1hour my screen turns fully red. What is happening? How do I fix this?
Apple Watch Series 3, watchOS 7
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The first (and simplest) thing to try if something isn’t working right is to restart your Apple Watch and its paired iPhone. If necessary (device not responding), try a forced restart. Both methods can be found here:
How to restart your Apple Watch - Apple Support
Restart your iPhone - Apple Support
If that doesn't help, the next steps would be to unpair and pair your watch again and restore from the backup just created. This deletes all temp and corrupted files and re-indexes the file system.
Unpair and erase your Apple Watch - Apple Support
Set up your Apple Watch - Apple Support
But, in this case, this may be a hardware problem. For service & repair:
watch Repair - Official Apple Support
watch Service Pricing - Apple Support